Chiral Lithium Amido Zincates for Enantioselective 1,2-Additions: Auto-assembling Reagents Involving a Fully Recyclable Ligand
作者:Mathieu Rouen、Pauline Chaumont、Gabriella Barozzino-Consiglio、Jacques Maddaluno、Anne Harrison-Marchand
DOI:10.1002/chem.201802044
日期:2018.7.2
enantioselective nucleophilic 1,2‐additions (ee values up to 97 %) from cheap, easily accessible, and never described before, chiral lithium amido zincates is presented. These multicomponent reactants auto‐assemble when mixing, in a 1:1 ratio, a homoleptic diorganozinc (R2Zn) with a chiral lithium amide (CLA). The latter, obtained after a single reductive amination, plays the role of the chiral inductor and is fully
提出了一种方法,该方法由廉价,易于获得且从未有过的手性氨基酰胺锌酸盐进行对映选择性亲核1,2-加成(ee值高达97%)。这些多组分反应物以1:1的比例混合均相二有机锌(R 2 Zn)和手性锂酰胺(CLA)时会自动组装。后者是在一次还原胺化后获得的,起手性感应剂的作用,并且由于简单的酸碱洗涤而可以完全回收,从而可以循环使用和重复使用,而不会损失立体化学信息。